I have an animation where the camera view goes from a side view with camera perspective off, then pans around to an isometric view with camera perspective on. It seems to keep perspective off until it has reached the final camera position, then turn perspective on. The actor is about 20ft long so this causes quite a noticeable "jump". Even when I simply turn perspective on/off the view changes significantly, zooming in an obnoxious amount to the actors.

Is there any way to create a smooth transition while toggling camera perspective on/off?

Yes I hoping to just have a short part of the animation with Perspective off. It makes it easier to see what is happening. I know you are supposed to be consistent within an animation and keep it on or off but in this instance toggling between the two made the animation easier to understand.

The only way I have found to get a decent looking switch between the two is to first set a camera view that is zoomed out, switch, then zoom back in.